46295 + Interview Questions in Chemistry

1.	29. How much ml of 5.6 volume strength H2O2 solution is required to completely reduce 100 ml of 0.1 M KMnO4 solution in acidic medium
Answer» 29. How much ml of 5.6 volume strength H2O2 solution is required to completely reduce 100 ml of 0.1 M KMnO4 solution in acidic medium

Discussion

2.	50. 16g of SO_x occupies 5.6litre at stp. Assuming ideal gas nature,the value of x is
Answer» 50. 16g of SO_x occupies 5.6litre at stp. Assuming ideal gas nature,the value of x is

Discussion

3.	Phenyl ring is known to exert negative inductive effect but each phenyl ring in biphenyl (C_6H_5-C_6H_5) is more reactive than benzene towards electophilic substitution-Explain.
Answer» Phenyl ring is known to exert negative inductive effect but each phenyl ring in biphenyl (C_6H_5-C_6H_5) is more reactive than benzene towards electophilic substitution-Explain.

Discussion

4.	19 Identify the incorrect from the following :- 1. Cr(III) > Fe(II) ; reducing character 2. Mn(III) > Cr(III) ; oxidising character 3. CrO3 > WO3 ; stability 4. all of these
Answer» 19 Identify the incorrect from the following :- 1. Cr(III) > Fe(II) ; reducing character 2. Mn(III) > Cr(III) ; oxidising character 3. CrO3 > WO3 ; stability 4. all of these

Discussion

5.	Assertion: Carboxylic acids have higher boiling points than alkanes. Reason: Carboxylic acids are resonance hybrids.
Answer» Assertion: Carboxylic acids have higher boiling points than alkanes. Reason: Carboxylic acids are resonance hybrids.

5.

Assertion: Carboxylic acids have higher boiling points than alkanes. Reason: Carboxylic acids are resonance hybrids.

Answer»

Assertion: Carboxylic acids have higher boiling points than alkanes.

Reason: Carboxylic acids are resonance hybrids.

Discussion

6.	5 mole of liquid water is compressed from 1 bar to 101 bar at cons†an t temperature.Find change in Gibb's energy(△ G) in joules
Answer» 5 mole of liquid water is compressed from 1 bar to 101 bar at cons†an t temperature.Find change in Gibb's energy(△ G) in joules

Discussion

7.	which of the following is more stable? 1. benzyl carbocation or allylic carbocation 2.benzyl carboanion or allylic carboanion 3. benzyl radicle or allylic radicl
Answer» which of the following is more stable? 1. benzyl carbocation or allylic carbocation 2.benzyl carboanion or allylic carboanion 3. benzyl radicle or allylic radicl

Discussion

8.	The addition of 0.1 mole of KBr to an aqueous solution containing 0.05 moles of AgNO3 results in the formation of an insoluble white precipitate of AgBr. Find the amount of AgBr that gets formed.(Ag=108 u, Br=80 u)
Answer» The addition of $0.1 mole$ of $K B r$ to an aqueous solution containing $0.05 moles$ of $A g N O_{3}$ results in the formation of an insoluble white precipitate of $A g B r$ . Find the amount of $A g B r$ that gets formed. $(A g = 108 u, B r = 80 u)$

Discussion

9.	Amongst the compound given, the one that would form a brilliantcoloured dye on treatment with NaNO2 in dil.HCL followed by additionto an alkaline solution Of β-naphtholis:
Answer» Amongst the compound given, the one that would form a brilliant coloured dye on treatment with NaNO₂ in dil.HCL followed by addition to an alkaline solution Of β-naphthol is:

9.

Amongst the compound given, the one that would form a brilliantcoloured dye on treatment with NaNO2 in dil.HCL followed by additionto an alkaline solution Of β-naphtholis:

Answer»

Amongst the compound given, the one that would form a brilliant
coloured dye on treatment with NaNO₂ in dil.HCL followed by addition
to an alkaline solution Of β-naphthol
is:

Discussion

10.	When xenon reacts with fluorine to form binary fluorides:
Answer» When xenon reacts with fluorine to form binary fluorides:

Discussion

11.	The value of lamda of Al3+ is x and Cl is y then, the value of lamda of AlCl3 ,will be1) x3+y 2) 3x+3y 3) x3+y3 4) 3x+y3
Answer» The value of lamda of ${A l}^{3 +}$ is x and $C l$ is y then, the value of lamda of $A l {C l}_{3}$ ,will be 1) $\frac{x}{3} + y$ 2) $3 x + 3 y$ 3) $\frac{x}{3} + \frac{y}{3}$ 4) $3 x + \frac{y}{3}$

11.

The value of lamda of Al3+ is x and Cl is y then, the value of lamda of AlCl3 ,will be1) x3+y 2) 3x+3y 3) x3+y3 4) 3x+y3

Answer»

The value of lamda of ${A l}^{3 +}$ is x and $C l$ is y then, the value of lamda of $A l {C l}_{3}$ ,will be

1) $\frac{x}{3} + y$

2) $3 x + 3 y$

3) $\frac{x}{3} + \frac{y}{3}$

4) $3 x + \frac{y}{3}$

Discussion

12.	Which of the following properties of elements - Cl,Br,andI increase(s) with the increase in atomic number?
Answer» Which of the following properties of elements - $C l, B r, a n d I$ increase(s) with the increase in atomic number?

Discussion

13.	An antipyretic drug on prolonged usage causes irreversible kidney damage. It is
Answer» An antipyretic drug on prolonged usage causes irreversible kidney damage. It is

Discussion

14.	55. The vapour pressure of 2.1% of an aqueous solution of a non electrolyte at 373 K is 755 mm calculate the molar mass of solute
Answer» 55. The vapour pressure of 2.1% of an aqueous solution of a non electrolyte at 373 K is 755 mm calculate the molar mass of solute

Discussion

15.	An acid solution of pH 6 is diluted thousand times. The pH of solution becomes approx ___ ?
Answer» An acid solution of pH 6 is diluted thousand times. The pH of solution becomes approx ___ ?

Discussion

16.	Teflon is a polymer of the monomer
Answer» Teflon is a polymer of the monomer

Discussion

17.	milk being a colloid can be coagulated by lime as an electrolyte into curd ut why upon the touch of fingers do the coagulation stops?
Answer» milk being a colloid can be coagulated by lime as an electrolyte into curd ut why upon the touch of fingers do the coagulation stops?

Discussion

18.	Which of the following species has the smallest radius?
Answer» Which of the following species has the smallest radius?

Discussion

19.	The incorrect statment among the following.
Answer» The incorrect statment among the following.

Discussion

20.	78. What volume of ccl4 having density 1.6 gram per CC contain 6.02 into 10 to the power 25 ccl4 molecules?
Answer» 78. What volume of ccl4 having density 1.6 gram per CC contain 6.02 into 10 to the power 25 ccl4 molecules?

Discussion

21.	20 Why a dehydrogenation of a alcoholic compound of formula C4H10O is not possible with copper metal at 573K temperature ?
Answer» 20 Why a dehydrogenation of a alcoholic compound of formula C4H10O is not possible with copper metal at 573K temperature ?

Discussion

22.	if the revolutions per second bt the electron in 3rd orbit of H is δ, then the revolutions per second by the electron in 2nd orbit of he^{+ }is
Answer» if the revolutions per second bt the electron in 3rd orbit of H is δ, then the revolutions per second by the electron in 2nd orbit of he^{+ }is

Discussion

23.	The order of stability of the hydrides is as follows:
Answer» The order of stability of the hydrides is as follows:

Discussion

24.	Consider the following reactionthe major product is expected to be:
Answer» Consider the following reaction the major product is expected to be:

Discussion

25.	Most stable conformation of 1-isopropyl-4-methylcyclohexane is:
Answer» Most stable conformation of 1-isopropyl-4-methylcyclohexane is:

Discussion

26.	43.Calculate number of atoms of each type in 6.84g of sucrose (c12h22o11).
Answer» 43.Calculate number of atoms of each type in 6.84g of sucrose (c12h22o11).

Discussion

27.	What information is obtained from azimuthal quantum number?
Answer» What information is obtained from azimuthal quantum number?

Discussion

28.	A hydrogen like species (atomic number Z) is present in a higher excited state of quantum number n. This excited atom can make a transition to the first excited state by successive emission of two photons of energies 10.20 eV and 17.0 eV respectively. Alternatively, the atom from the same excited state can make a transition to the second excited state by successive emission of two photons of energy 4.25 eV and 5.95 eV respectively. Determine the value of Z.(Given: 27.210.2=2.66 , 601.66≈36 , hcRH=13.6 eV)
Answer» A hydrogen like species (atomic number $Z$ ) is present in a higher excited state of quantum number $n$ . This excited atom can make a transition to the first excited state by successive emission of two photons of energies $10.20 e V$ and $17.0 e V$ respectively. Alternatively, the atom from the same excited state can make a transition to the second excited state by successive emission of two photons of energy $4.25 e V$ and $5.95 e V$ respectively. Determine the value of $Z$ . $(G i v e n : \frac{27.2}{10.2} = 2.66, \frac{60}{1.66} \approx 36, h c R_{H} = 13.6 e V)$

Discussion

29.	Why is H2O a liquid and H2S a gas?
Answer» Why is H₂O a liquid and H₂S a gas?

Discussion

30.	What is this name CH3 CH2OH?
Answer» What is this name $C H_{3} C H_{2} O H$ ?

Discussion

31.	Differentiate thefollowing w.r.t. x:
Answer» Differentiate the following w.r.t. x:

31.

Differentiate thefollowing w.r.t. x:

Answer»

Differentiate the
following w.r.t. x:

Discussion

32.	Benzylamine may be alkylated as shown in the following equation: C6H5CH2NH2+R−X→C6H5CH2NHR Which of the following alkyl halides is best suited for this reaction through SN1 mechanism?
Answer» Benzylamine may be alkylated as shown in the following equation: $C_{6} H_{5} C H_{2} N H_{2} + R - X \to C_{6} H_{5} C H_{2} N H R$ Which of the following alkyl halides is best suited for this reaction through $S_{N} 1$ mechanism?

Discussion

33.	First three nearest neighbour distances for primitive cubic unit cell will be, respectively:(Here, edge length of unit cell =l )
Answer» First three nearest neighbour distances for primitive cubic unit cell will be, respectively: (Here, edge length of unit cell $= l$ )

Discussion

34.	15 moles of H_2, and 5.2 moles of I_{}, are mixed and then allowed to attain equilibrium at 500^° C. At equilibrium,the concentration of HI is found to be 10 moles. The equilibrium constant for the formation of HI is
Answer» 15 moles of H_2, and 5.2 moles of I_{}, are mixed and then allowed to attain equilibrium at 500^° C. At equilibrium,the concentration of HI is found to be 10 moles. The equilibrium constant for the formation of HI is

Discussion

35.	In the electrolytic refining of copper using CuSO4 as the electrolyte, the anode reaction is
Answer» In the electrolytic refining of copper using $C u S O_{4}$ as the electrolyte, the anode reaction is

Discussion

36.	In which of the following molecule the central atom has more than 8 electrons in outermost orbit SO2 , so3,P2O5
Answer» In which of the following molecule the central atom has more than 8 electrons in outermost orbit SO2 , so3,P2O5

Discussion

37.	A hydrogenation reaction is carried out at 500 K. If the same reaction is carried out in the presence of a catalyst at the same rate, the temperature required is 400 K. Calculate the activation energy of the catalysed reaction if the catalyst lowers the activation energy barrier by 20 kJ/mol.
Answer» A hydrogenation reaction is carried out at 500 K. If the same reaction is carried out in the presence of a catalyst at the same rate, the temperature required is 400 K. Calculate the activation energy of the catalysed reaction if the catalyst lowers the activation energy barrier by 20 kJ/mol.

Discussion

38.	what is the dimensional formula of d^2y/dx^2.how can the solution be d/dx(dy/dx).it should be d/dx(dy/x)right?
Answer» what is the dimensional formula of d^2y/dx^2.how can the solution be d/dx(dy/dx).it should be d/dx(dy/x)right?

Discussion

39.	AN ORGANIC COMPOUND 'A 'ON TREATING WITH ACIDIFIED POTTASIUM DICHROMATE SOLUTION GIVES B WITH MOLECULAR MASS 60gm/mol . 'A' ON HEATING WITJ CONC. H2so4 at 443 K produces a gas that decolurises bromine water . the compound 'A is
Answer» AN ORGANIC COMPOUND 'A 'ON TREATING WITH ACIDIFIED POTTASIUM DICHROMATE SOLUTION GIVES B WITH MOLECULAR MASS 60gm/mol . 'A' ON HEATING WITJ CONC. H2so4 at 443 K produces a gas that decolurises bromine water . the compound 'A is

Discussion

40.	16. In which excited state is Chlorine in ClF3 ? 1) First 2) Second 3) Third 4) Fourth
Answer» 16. In which excited state is Chlorine in ClF3 ? 1) First 2) Second 3) Third 4) Fourth

Discussion

41.	What is the trapping of the sun's solar energy and radiation called?
Answer» What is the trapping of the sun's solar energy and radiation called?

Discussion

42.	Mg2C3 reacts with water forming propyne gas.ions has
Answer» Mg₂C₃ reacts with water forming propyne gas.ions has

Discussion

43.	In KCl because it is ionic compound we assign oxidation no 1+ &1- for K& Cl respectively. but for chlorate ion (ClO3)−1 should we assign -1 for Cl and 0 for Oxygen by following sum rule or should we assign -2 for O and following sum rule +5 for Cl so net oxidation no is -1.which of these is correct ? How ?
Answer» In KCl because it is ionic compound we assign oxidation no 1+ &1- for K& Cl respectively. but for chlorate ion ${(C l O_{3})}_{3}^{- 1}$ should we assign -1 for Cl and 0 for Oxygen by following sum rule or should we assign -2 for O and following sum rule +5 for Cl so net oxidation no is -1.which of these is correct ? How ?

Discussion

44.	Which of the following sawhorse representation is correct for the given newman projection?
Answer» Which of the following sawhorse representation is correct for the given newman projection?

Discussion

45.	37. What is hybridisation of central atom in NO2
Answer» 37. What is hybridisation of central atom in NO2

Discussion

46.	In an atom, the total number of electrons having quantum numbers n 4, m = 1 and ms=-1/2
Answer» In an atom, the total number of electrons having quantum numbers n 4, m = 1 and ms=-1/2

Discussion

47.	If basicity increases then acidic character also increase or not ?
Answer» If basicity increases then acidic character also increase or not ?

Discussion

48.	When Cl2 is passed through hot and conc. solution of KOH, following compound is formed
Answer» When $C l_{2}$ is passed through hot and conc. solution of KOH, following compound is formed

Discussion

49.	If Cv=4.96 cal/mol.K then the amount of heat absorbed at constant volume, when temperature of 2 moles of this gas is increased from 332 K to 542 K is:
Answer» If $C_{v} = 4.96 c a l / m o l . K$ then the amount of heat absorbed at constant volume, when temperature of 2 moles of this gas is increased from $332 K$ to $542 K$ is:

Discussion

50.	The no. Of possible isomers of K2[PdClBr2(SCN)]
Answer» The no. Of possible isomers of K2[PdClBr2(SCN)]

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

29. How much ml of 5.6 volume strength H2O2 solution is required to completely reduce 100 ml of 0.1 M KMnO4 solution in acidic medium

50. 16g of SO_x occupies 5.6litre at stp. Assuming ideal gas nature,the value of x is

Phenyl ring is known to exert negative inductive effect but each phenyl ring in biphenyl (C_6H_5-C_6H_5) is more reactive than benzene towards electophilic substitution-Explain.

19 Identify the incorrect from the following :- 1. Cr(III) > Fe(II) ; reducing character 2. Mn(III) > Cr(III) ; oxidising character 3. CrO3 > WO3 ; stability 4. all of these

Assertion: Carboxylic acids have higher boiling points than alkanes. Reason: Carboxylic acids are resonance hybrids.

5 mole of liquid water is compressed from 1 bar to 101 bar at cons†an t temperature.Find change in Gibb's energy(△ G) in joules

which of the following is more stable? 1. benzyl carbocation or allylic carbocation 2.benzyl carboanion or allylic carboanion 3. benzyl radicle or allylic radicl

The addition of 0.1 mole of KBr to an aqueous solution containing 0.05 moles of AgNO3 results in the formation of an insoluble white precipitate of AgBr. Find the amount of AgBr that gets formed.(Ag=108 u, Br=80 u)

Amongst the compound given, the one that would form a brilliantcoloured dye on treatment with NaNO2 in dil.HCL followed by additionto an alkaline solution Of β-naphtholis:

When xenon reacts with fluorine to form binary fluorides:

The value of lamda of Al3+ is x and Cl is y then, the value of lamda of AlCl3 ,will be1) x3+y 2) 3x+3y 3) x3+y3 4) 3x+y3

Which of the following properties of elements - Cl,Br,andI increase(s) with the increase in atomic number?

An antipyretic drug on prolonged usage causes irreversible kidney damage. It is

55. The vapour pressure of 2.1% of an aqueous solution of a non electrolyte at 373 K is 755 mm calculate the molar mass of solute

An acid solution of pH 6 is diluted thousand times. The pH of solution becomes approx ___ ?

Teflon is a polymer of the monomer

milk being a colloid can be coagulated by lime as an electrolyte into curd ut why upon the touch of fingers do the coagulation stops?

Which of the following species has the smallest radius?

The incorrect statment among the following.

78. What volume of ccl4 having density 1.6 gram per CC contain 6.02 into 10 to the power 25 ccl4 molecules?

20 Why a dehydrogenation of a alcoholic compound of formula C4H10O is not possible with copper metal at 573K temperature ?

if the revolutions per second bt the electron in 3rd orbit of H is δ, then the revolutions per second by the electron in 2nd orbit of he^{+ }is

The order of stability of the hydrides is as follows:

Consider the following reactionthe major product is expected to be:

Most stable conformation of 1-isopropyl-4-methylcyclohexane is:

43.Calculate number of atoms of each type in 6.84g of sucrose (c12h22o11).

What information is obtained from azimuthal quantum number?

Why is H2O a liquid and H2S a gas?

What is this name CH3 CH2OH?

Differentiate thefollowing w.r.t. x:

Benzylamine may be alkylated as shown in the following equation: C6H5CH2NH2+R−X→C6H5CH2NHR Which of the following alkyl halides is best suited for this reaction through SN1 mechanism?

First three nearest neighbour distances for primitive cubic unit cell will be, respectively:(Here, edge length of unit cell =l )

15 moles of H_2, and 5.2 moles of I_{}, are mixed and then allowed to attain equilibrium at 500^° C. At equilibrium,the concentration of HI is found to be 10 moles. The equilibrium constant for the formation of HI is

In the electrolytic refining of copper using CuSO4 as the electrolyte, the anode reaction is

In which of the following molecule the central atom has more than 8 electrons in outermost orbit SO2 , so3,P2O5

A hydrogenation reaction is carried out at 500 K. If the same reaction is carried out in the presence of a catalyst at the same rate, the temperature required is 400 K. Calculate the activation energy of the catalysed reaction if the catalyst lowers the activation energy barrier by 20 kJ/mol.

what is the dimensional formula of d^2y/dx^2.how can the solution be d/dx(dy/dx).it should be d/dx(dy/x)right?

AN ORGANIC COMPOUND 'A 'ON TREATING WITH ACIDIFIED POTTASIUM DICHROMATE SOLUTION GIVES B WITH MOLECULAR MASS 60gm/mol . 'A' ON HEATING WITJ CONC. H2so4 at 443 K produces a gas that decolurises bromine water . the compound 'A is

16. In which excited state is Chlorine in ClF3 ? 1) First 2) Second 3) Third 4) Fourth

What is the trapping of the sun's solar energy and radiation called?

Mg2C3 reacts with water forming propyne gas.ions has

Which of the following sawhorse representation is correct for the given newman projection?

37. What is hybridisation of central atom in NO2

In an atom, the total number of electrons having quantum numbers n 4, m = 1 and ms=-1/2

If basicity increases then acidic character also increase or not ?

When Cl2 is passed through hot and conc. solution of KOH, following compound is formed

If Cv=4.96 cal/mol.K then the amount of heat absorbed at constant volume, when temperature of 2 moles of this gas is increased from 332 K to 542 K is:

The no. Of possible isomers of K2[PdClBr2(SCN)]